feat: 增加json数据导出功能

app/static/index.html

@@ -914,6 +914,12 @@
                                 查询缓存
                             </button>
                         </div>
+                        <div class="form-group">
+                            <button class="btn btn-success" onclick="exportData()" style="height: 42px;" id="btnExportData" disabled>
+                                <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/></svg>
+                                导出数据
+                            </button>
+                        </div>
                     </div>
                     <div id="queryResult" class="hidden" style="margin-top: 20px;"></div>
                 </div>
@@ -1805,12 +1811,14 @@
 
                 if (!res.ok) {
                     showToast(data.detail || '未找到缓存数据', 'error');
+                    document.getElementById('btnExportData').disabled = true;
                     return;
                 }
 
                 addLog(`查询成功: ${symbol}, 缓存 ${data.timeframes ? data.timeframes.length : 0} 个周期`, 'success');
                 
                 currentQueryData = data;
+                document.getElementById('btnExportData').disabled = false;
                 
                 if (!data.timeframes || data.timeframes.length === 0) {
                     document.getElementById('queryResult').innerHTML = '<div class="empty-state"><p>暂无K线数据</p></div>';
@@ -1822,7 +1830,49 @@
                 
             } catch (e) {
                 showToast(`查询失败: ${e.message}`, 'error');
+                document.getElementById('btnExportData').disabled = true;
+            }
+        }
+
+        function exportData() {
+            if (!currentQueryData || !currentQueryData.timeframes || currentQueryData.timeframes.length === 0) {
+                showToast('暂无可导出的数据', 'error');
+                return;
             }
+
+            const symbol = document.getElementById('querySymbol').value.trim() || 'unknown';
+            const timestamp = new Date().toISOString().replace(/[:.]/g, '-').slice(0, 19);
+            const filename = `${symbol}_多周期数据_${timestamp}.json`;
+
+            const exportObj = {
+                symbol: currentQueryData.symbol || symbol,
+                type: currentQueryData.type || 'futures',
+                current_price: currentQueryData.current_price,
+                timestamp: currentQueryData.timestamp || new Date().toISOString(),
+                timeframes: {}
+            };
+
+            currentQueryData.timeframes.forEach(tf => {
+                exportObj.timeframes[tf.period] = tf.candles || [];
+            });
+
+            const jsonStr = JSON.stringify(exportObj, null, 2);
+            const blob = new Blob([jsonStr], { type: 'application/json' });
+            const url = URL.createObjectURL(blob);
+            
+            const a = document.createElement('a');
+            a.href = url;
+            a.download = filename;
+            document.body.appendChild(a);
+            a.click();
+            document.body.removeChild(a);
+            URL.revokeObjectURL(url);
+
+            const periodCount = currentQueryData.timeframes.length;
+            const totalCandles = currentQueryData.timeframes.reduce((sum, tf) => sum + (tf.candles ? tf.candles.length : 0), 0);
+            
+            addLog(`数据导出成功: ${filename}, ${periodCount} 个周期, ${totalCandles} 条K线`, 'success');
+            showToast(`已导出 ${periodCount} 个周期数据`, 'success');
         }
 
         function renderKlineChart(timeframe, symbol) {